I have 2 that I never hunt without.
First, my youngest brothers watch given to him by his girlfriend at the time. Then was given to me following his passing away in late September of 2002 just before the start of my deer season that year. I haven't left home without it since.
Second, my wedding ring. I don't usuaully wear it around. I just don't like jewelry too much. But I always wear it when hunting. It reminds me of my wife.. sleeping at home in our warm bed.. while I freeze.. up in a tree.. in the cold and wind and sometimes the rain and the snow.. waiting for a deer.. while she sleeps in peace and warmth.